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The Prusa i3 Aluminum Frame does not have the back supports like the LC wooden frame and can cause flaws in the quality of your prints, The movement of the y axis can have a lot of affect on the rigidness of the x axis creating lifts between print layers.
We have encountered this many of times with our own 3d printers and have come up with the Prusa i3 Aluminum Frame Brace.
It does not reduce your print size you can still get 200 x 200 x 185.
8 x 10mm Nuts
2 x 10mm Threaded rods at 364mm
Dissemble the back bottom threaded rod of the y axis.
Put the bottom 10mm nuts into the bottom nut holder on both brace feet.
Put a 10mm nut into the top nut hole on each brace feet. screw both 364mm threaded rods into the brace feet and tighten them as much as possible then loosen 3-4 turns.
Thread a 10mm nut on the other end of the 364mm threaded rod about a quarter of the way down.
put the 2 remaining 10mm nuts into the nut holes on the brace tops.
Pull the y axis threaded rod to one side to allow room for the brace foot.
push the brace top onto the frame and tighten / loosen until the brace top is pushing onto the frame top and the brace foot is flat on the surface and aligned with the y axis threaded rod.
Slide the y axis threaded rod through the brace foot and all the way over to leave room for the brace foot on the other side. repeat step 6.
- Slide the y axis threaded rod through the brace foot and re align the y axis bottom threaded rod and tighten all nuts.